1. Step here -> Registration for XOLO For immediately billing: Xolo REF ZEY Xolo REF TOR Xolo REF THO Xolo is all for solos Compliance, taxation, invoicing and admin solutions for fiercely independent solopreneurs across the globe. We do not provide any advisory service herewith - we expressly point out that each person is responsible for filing the correct tax return in his or her competent country.